[BizarroLand]

Even better, bubble CO2 rich air into freshwater vats of Wolffia.

Wolffia is the fastest growing plant on the planet and can double in size in a day. It's small, so it would work well as fuel for biomass reactors, the carbon char would be mostly derived from atmospheric carbon, resulting in a net negative, you can grow fish in the water underneath it, and it itself is edible and eaten already in many parts of the world where it grows naturally.

Further, it likes the slightly acidic water that bubbling CO2 into the water would create and it specifically oxygenates the water it floats in by stripping oxygen from CO2 during photosynthesis.

The downside is that no one has figured out the full process for continuously farming Wolffia yet, but if you solve that you can solve many other problems and create a multiple stream of income business out of taking carbon out of the air. (Biomass reactor fuel, plant food source for humans and animals, fish food source & selling carbon credits)